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It seems that you used a pinyin IME to type the characters. There are a lot of wrong characters.
–
HuangJan 11 '13 at 9:35

1

“已经很晚了” is ambiguous between "late in the day" and "later than expected". Without further indication, people will assume the former not the latter. Without 很, i.e. “已经晚了” only means the latter (later than expected). Alternatively you can use 迟/迟到 as @Growler's answer suggested.
–
NS.X.Jan 11 '13 at 19:39

Oops, I should have proofread the IME on my phone. Thanks for the clarification about 晚.
–
ashJan 14 '13 at 9:48

2 Answers
2

UPDATE: I noticed that different sources disagree on whether to call the 到 in the context you used it a complement of result. For example according to the Chinese Grammar Wiki it is not a complement of result (and it's also my feeling). The most common definition is that a complement of result implies that an action has attained the expected aim or result. However the Mandarin Essential Grammar Guide of the University of Yale lists this use case under complement of result. See below for more details.

In any case, regarding to your question

Is using the resultative complement 到 generally equivalent to saying
"at the time this action was finished"?

In your examples the 到 doesn't refer to time but to the location where you arrived.

In your case it refers to the fact that one reaches or arrives at a place. So the 到 on its own doesn't is not generally equivalent to saying "at the time this action was finished". The time reference comes from 的时候 (到的时候 = when (one) arrived)